理解Java中的深拷贝和浅拷贝

下面列表是Java中深拷贝和浅拷贝的区别

Shallow Copy	Deep Copy
Cloned Object and original object are not 100% disjoint.	Cloned Object and original object are 100% disjoint.
Any changes made to cloned object will be reflected in original object or vice versa.	Any changes made to cloned object will not be reflected in original object or vice versa.
Default version of clone method creates the shallow copy of an object.	To create the deep copy of an object, you have to override clone method.
Shallow copy is preferred if an object has only primitive fields.	Deep copy is preferred if an object has references to other objects as fields.
Shallow copy is fast and also less expensive.	Deep copy is slow and very expensive.

表格来源：Difference Between Shallow Copy Vs Deep Copy In Java

浅拷贝	深拷贝
原对象和克隆对象并不是100%无关联	原对象和克隆对象100%无关联
对克隆对象的任何改变都会反映在原对象中，反之亦然	克隆对象的改变不会反映在原对象中，反之亦然
默认的clone()方法创建的是浅拷贝	要实现深拷贝，必须重写clone()方法
如果一个对象中字段只有基本类型，推荐浅拷贝	如果一个对象中字段存在其他对象的引用类型，推荐深拷贝
浅拷贝速度快，代价小	深拷贝相对较慢，代价大

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通过实例理解浅拷贝和深拷贝TODO